<!DOCTYPE html>
<html lang="zh">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>手写jQuery</title>
    <style>
        .red {
            color: red;
        }

        .blue {
            color: blue;
        }
    </style>
</head>

<body>
    <div class="test">你好1
        <div class="child">child1</div>
        <div class="child">child2</div>
        <div class="child">child3</div>
    </div>
    <div class="test">你好2
        <div class="child">child4</div>
        <div class="child">child5</div>
    </div>
    <div class="test">你好3
        <div class="child">child6</div>
    </div>
    <script src="jquery.js"></script>
    <script src="main.js"></script>
</body>

</html>